Computer Vision

Core Machine Learning

Meta-Learning with Shared Amortized Variational Inference

August 13, 2020

Abstract

We propose a novel amortized variational inference scheme for an empirical Bayes meta-learning model, where model parameters are treated as latent variables. We learn the prior distribution over model parameters conditioned on limited training data using a variational autoencoder approach. Our framework proposes sharing the same amortized inference network between the conditional prior and variational posterior distributions over the model parameters. While the posterior leverages both the labeled support and query data, the conditional prior is based only on the labeled support data. We show that in earlier work, relying on Monte-Carlo approximation, the conditional prior collapses to a Dirac delta function. In contrast, our variational approach prevents this collapse and preserves uncertainty over the model parameters. We evaluate our approach on the miniImageNet, CIFAR-FS and FC100 datasets, and present results demonstrating its advantages over previous work.

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AUTHORS

Written by

Ekaterina Iakovleva

Jakob Verbeek

Karteek Alahari

Publisher

International Conference on Machine Learning (ICML) 2020

Research Topics

Computer Vision

Core Machine Learning

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